make --with_ex a package option

sa/sa.spec

@@ -22,6 +22,9 @@
 ##  SUCH DAMAGE.
 ##
 
+#   package options
+%{!?with_ex:                 %define  with_ex                 no}
+
 #   package information
 Name:         sa
 Summary:      Socket Abstraction Library
@@ -32,7 +35,7 @@ Distribution: OpenPKG [PLUS]
 Group:        System
 License:      MIT/X11-style
 Version:      1.0.2
-Release:      20021204
+Release:      20021216
 
 #   list of sources
 Source0:      ftp://ftp.ossp.org/pkg/lib/sa/sa-%{version}.tar.gz
@@ -40,8 +43,11 @@ Source0:      ftp://ftp.ossp.org/pkg/lib/sa/sa-%{version}.tar.gz
 #   build information
 Prefix:       %{l_prefix}
 BuildRoot:    %{l_buildroot}
-BuildPreReq:  OpenPKG, openpkg >= 20020206, ex
-PreReq:       OpenPKG, openpkg >= 20020206, ex
+BuildPreReq:  OpenPKG, openpkg >= 20020206
+PreReq:       OpenPKG, openpkg >= 20020206
+%if "%{with_ex}" == "yes"
+BuildPreReq:  ex
+%endif
 AutoReq:      no
 AutoReqProv:  no
 
@@ -55,7 +61,9 @@ AutoReqProv:  no
     CFLAGS="%{l_cflags -O}" \
     ./configure \
         --prefix=%{l_prefix} \
+%if "%{with_ex}" == "yes"
         --with-ex=%{l_prefix} \
+%endif
         --disable-shared
     %{l_make} %{l_mflags -O}